Managing state across ephemeral instances
WHAT IT TESTS: stateless design discipline. OUTLINE: keep instances stateless, externalize sessions to Redis, data to managed databases, files to object storage. RED FLAG: storing durable state on local instance disks that vanish when an instance is replaced.
WHAT IT TESTS: whether you keep the compute tier stateless and externalize all durable state. ANSWER OUTLINE: treat instances as disposable. Move session state to a shared cache like Redis, transactional data to a managed database such as RDS or Cloud SQL, large objects to S3 or Blob storage, and shared files to a network file service. Use sticky sessions only as a fallback.
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- #state-management
- #stateless
- #managed-services
- #redis
- #object-storage
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